Toothbrush



FIG. 1 is a front perspective view, as seen from the top end, left side of a toothbrush of my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a left side elevation view thereof, the right side being a mirror image of the left side elevation as shown in FIG. 4;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a toothbrush, as shown and described. 